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Firefly (cache coherence protocol)

The Firefly cache coherence protocol is the schema used in the DEC Firefly multiprocessor workstation, developed by DEC Systems Research Center. This protocol is a 3 State Write Update Cache Coherence Protocol. Unlike the Dragon protocol, the Firefly protocol updates the Main Memory as well as the Local caches on Write Update Bus Transition. Thus the…

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MESI protocol
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Cache coherenceDEC FireflyDEC Systems Research CenterDragon protocol
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Firefly (cache coherence protocol)

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Avg. degree1.8
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cache block state protocol write processor caches shared memory request copy coherence firefly update already data valid dragon states dirty

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